I have a aironet350 AP with Laptops connecting to the AP. The Clients connsct to the AP Fine. I use Static IP's in my environment. I can ping a laptop from the AP, and from the switch on the local LAN. This is a remote branch that i connect to via a frame relay WAN. What would stop me from being able to ping across the WAN???
Check your MTU, The MTU specifies the maximum size of a physical packet created by a transmitting device. To work properly, all the devices on the path a packet travels must agree on this value. Since the vast majority of local area networks run on Ethernet, the default MTU size adopted by most networking equipment is 1500 bytes. Better check if this matches the frame relay MTU set on the WAN interfaces.